There's an article in the Sunday NYT about the resurgence of drive-in movie theaters in California. I remember them as being a ton of fun, back in the day. (And you could smoke dope in your car, which the article doesn't mention. Just saying. It was the 60s, after all.)
In discussing the downfall of these popular attractions, the article mentioned something I'd never thought about. It makes perfect sense:
The solidification of daylight saving time in the 1960s contributed to the drive-in’s downfall, forcing later starting times.